Morphological studies with regression analysis

Abstract

Quantitative methods of morphology are more objective and accurate than qualitative methods, since they are based not only on the instrumental assessment of the trait, but also on the data of the recording equipment, which completely eliminates the subjectivity of the researcher. A morphometric analysis of the lungs of embryos of white rats 18–21 days old, newborns and rat pups 2–10 days of life in normal and experimental oligohydramnios was carried out, a regression model was constructed for the dependence of the relative volume of the respiratory section of the lungs of fetuses, newborns and rats of the first days of life on age. Formulas have been obtained for the norm and experimental oligohydramnios, which make it possible to determine not only deviations in the development of the lungs from normal values during various experimental effects, but also to predict further changes in the respiratory section in normal and pathological conditions. A morphometric study of the autopsy material of the abdominal aorta wall was carried out in 72 people (42 males and 30 females) aged from 1 to 70 years; a regression model was constructed for the dependence of the number of fenestrated elastic membranes on age. Formulas for men and women were obtained, which allow to determine the average number of fenestrated elastic membranes in the middle shell of the abdominal aortain different age periods. The search for correlations in medical morphological studies is especially relevant, as it makes it possible to identify the relationship between different variants of the structure and changes in function.